Max Verstappen's deal with Red Bull was due to expire this year, and he had been earmarked as a potential candidate to replace Lewis Hamilton at Mercedes if he left for Ferrari.
"Honestly I'm proud, definitely, but I'm super-grateful to this incredible team and all the people at Mercedes who have continued to push this year," said Lewis Hamilton.
Lewis Hamilton's success extended his points-scoring run to a record-equalling 33 races, levelling with his own record, and brought him his 50th victory from pole position.
Max Verstappen was third for Red Bull ahead of the two Ferraris of Charles Leclerc and Sebastian Vettel with Alex Albon taking sixth in the second Red Bull.
Lewis Hamilton accepted the blame and apologised to Alex Albon who finished outside the top ten for the first time since he joined Red Bull mid-season.
Max Verstappen registered a commanding victory for Red Bull in an astonishing and crash-hit Brazilian Grand Prix at Interlagos.
Brazilian GP: Max Verstappen produced a best lap in one minute and 7.508 seconds to outpace four-time champion Sebastian Vettel's Ferrari in a final flurry.
Lewis Hamilton, who retained his crown in Texas two weeks ago, said he was as keen as ever to win the final events in Brazil and Abu Dhabi, but added that Mercedes can take more risks.
The goal to eliminate the sport carbon footprint includes not only race cars on the track but the entire F1 circus that accompanies the sport.
Lewis Hamilton sealed his sixth world title, leaving him one adrift of Michael Schumacher on seven.
Valtteri Bottas, the only man who can delay Lewis Hamilton's celebrations, kept alive his own faint and unlikely statistical hopes.
Lewis Hamilton needs only to finish in the top eight at the United States Grand Prix to be champion even if his Mercedes team-mate Valtteri Bottas wins the race.
Max Verstappen hit back at his critics, including Lewis Hamilton and Sebastian Vettel, saying their post-race comments in Mexico proved that he was "in their heads".
Lewis Hamilton believes that when racing against Max Verstappen, there is a higher possibility of contact and an accident.
If Japanese Grand Prix qualifying is not possible on Sunday morning because of continuing bad weather, then the grid will be decided based on Friday's second free practice times.
Lewis Hamilton pulled out a dazzling final sector and final lap to take second ahead of Sebastian Vettel in the other Ferrari by a narrow margin.
Max Verstappen clocked a best lap in one minute and 33.162 seconds to outpace Charles Leclerc by 0.335 seconds on a cool and dry afternoon.
Sebastian Vettel endured a torrid and disappointing day, finishing 13th after spinning off and taking a penalty for rejoining in a dangerous fashion.